Utah, Florida and Arizona is probably what they are talking about. It's worth it if you ever travel out of California. And no, it probably will do nothing to help you get your California CCW. Your location and "Good Cause" is what is important to getting your California permit.

CCWs do not enjoy reciprocity as other licenses do. If you have a Nevada CCW for example it may not be recognized in California, California's may or may not be recognized in other locations. The only person that can issue your CCW is your Sheriff or Police Chief. Both my Sheriff and Police Chief's are libs so despite a very real and present danger to my safety I do not ask their "permission" to carry in Solano Co. They know I carry as do the 12 or so Sheriff's in the areas I most often carry. None have chosen to strap me on.